forked from len0rd/rockbox
Archos targets: Self-extractor for on-disk firmware images to work around the file size limit. Re-uses rockbox.ucl. Not yet integrated with build system.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8089 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold
parent
4923f49c6f
commit
dbff1f20ee
3 changed files with 266 additions and 0 deletions
42
firmware/decompressor/Makefile
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42
firmware/decompressor/Makefile
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# __________ __ ___.
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# Open \______ \ ____ ____ | | _\_ |__ _______ ___
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# Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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# Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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# Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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# \/ \/ \/ \/ \/
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# $Id$
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#
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CC = sh-elf-gcc
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LD = sh-elf-ld
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AR = sh-elf-ar
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AS = sh-elf-as
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OC = sh-elf-objcopy
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TOOLSDIR=../../tools
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OBJDIR := .
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# FIXME: get proper value from build system
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MEMORYSIZE = 2
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LDS := link.lds
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LINKFILE = $(OBJDIR)/linkage.lds
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OBJS := $(OBJDIR)/decompressor.o $(OBJDIR)/rockboxucl.o
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CFLAGS = -O -W -Wall -m1 -nostdlib -ffreestanding -Wstrict-prototypes -fomit-frame-pointer -fschedule-insns
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$(OBJDIR)/compressed.bin : $(OBJDIR)/compressed.elf
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@echo "OBJCOPY "`basename $@`
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@$(OC) -O binary $< $@
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$(OBJDIR)/compressed.elf : $(OBJS) $(LINKFILE)
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@echo "LD rockbox.elf"
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@$(CC) $(GCCOPTS) -Os -nostdlib -o $@ $(OBJS) -T$(LINKFILE) -Wl,-Map,$(OBJDIR)/compressed.map
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$(LINKFILE): $(LDS)
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@echo "Build LDS file"
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@cat $< | $(CC) -DMEMORYSIZE=$(MEMORYSIZE) $(INCLUDES) $(TARGET) $(DEFINES) -E -P $(ROMBUILD) - >$@
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$(OBJDIR)/rockboxucl.o: $(OBJDIR)/rockbox.ucl
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@echo "OBJCOPY rockbox.ucl"
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@$(OC) -I binary -O elf32-sh -B sh --rename-section .data=.image,alloc,load,data,contents $< $@
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150
firmware/decompressor/decompressor.c
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150
firmware/decompressor/decompressor.c
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 by Jens Arnold
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*
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* Self-extracting firmware loader to work around the 200KB size limit
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* for archos player and recorder v1
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* Decompresses a built-in UCL-compressed image (method 2e) and executes it.
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#define ICODE_ATTR __attribute__ ((section (".icode")))
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#define UCL_HEADER 26 /* size of the header generated by uclpack */
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/* Symbols defined in the linker script */
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extern char iramcopy[], iramstart[], iramend[];
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extern char stackend[];
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extern char imgstart[], imgend[];
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extern char loadaddress[], dramend[];
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/* Prototypes */
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void start(void) __attribute__ ((section (".start")));
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void main(void) ICODE_ATTR;
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int ucl_nrv2e_decompress_8(const unsigned char *src, unsigned char *dst,
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unsigned long *dst_len) ICODE_ATTR;
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/* Vector table */
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void (*vbr[]) (void) __attribute__ ((section (".vectors"))) =
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{
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start, (void *)stackend,
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start, (void *)stackend,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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};
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/* Inline copy function */
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static inline void longcopy(long *dst, long *dst_end, const long *src)
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__attribute__ ((always_inline));
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static inline void longcopy(long *dst, long *dst_end, const long *src)
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{
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while (dst < dst_end)
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*dst++ = *src++;
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}
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/* Entry point */
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void start(void)
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{
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longcopy((long *)iramstart, (long *)iramend, (long *)iramcopy);
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main();
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}
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/** All subsequent functions are executed from IRAM **/
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/* Thinned out version of the UCL 2e decompression sourcecode
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* Original (C) Markus F.X.J Oberhumer under GNU GPL license */
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#define GETBIT(bb, src, ilen) \
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(((bb = bb & 0x7f ? bb*2 : ((unsigned)src[ilen++]*2+1)) >> 8) & 1)
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int ucl_nrv2e_decompress_8(const unsigned char *src, unsigned char *dst,
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unsigned long *dst_len)
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{
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unsigned long bb = 0;
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unsigned ilen = 0, olen = 0, last_m_off = 1;
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for (;;)
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{
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unsigned m_off, m_len;
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while (GETBIT(bb,src,ilen))
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dst[olen++] = src[ilen++];
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m_off = 1;
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for (;;)
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{
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m_off = m_off*2 + GETBIT(bb,src,ilen);
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if (GETBIT(bb,src,ilen))
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break;
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m_off = (m_off-1)*2 + GETBIT(bb,src,ilen);
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}
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if (m_off == 2)
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{
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m_off = last_m_off;
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m_len = GETBIT(bb,src,ilen);
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}
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else
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{
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m_off = (m_off-3)*256 + src[ilen++];
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if (m_off == 0xffffffff)
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break;
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m_len = (m_off ^ 0xffffffff) & 1;
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m_off >>= 1;
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last_m_off = ++m_off;
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}
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if (m_len)
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m_len = 1 + GETBIT(bb,src,ilen);
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else if (GETBIT(bb,src,ilen))
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m_len = 3 + GETBIT(bb,src,ilen);
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else
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{
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m_len++;
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do {
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m_len = m_len*2 + GETBIT(bb,src,ilen);
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} while (!GETBIT(bb,src,ilen));
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m_len += 3;
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}
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m_len += (m_off > 0x500);
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{
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const unsigned char *m_pos;
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m_pos = dst + olen - m_off;
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dst[olen++] = *m_pos++;
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do dst[olen++] = *m_pos++; while (--m_len > 0);
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}
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}
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*dst_len = olen;
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return ilen;
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}
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/* This will never return */
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void main(void)
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{
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unsigned long dst_len; /* dummy */
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unsigned long img_len = (unsigned long)(imgend - imgstart);
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longcopy((long *)(dramend - img_len), (long *) dramend,
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(long *) imgstart);
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ucl_nrv2e_decompress_8(dramend - img_len + UCL_HEADER,
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loadaddress, &dst_len);
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asm(
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"mov.l @%0+,r0 \n"
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"mov.l @%0+,r15 \n"
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"jmp @r0 \n"
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"nop \n"
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: : "r"(loadaddress) : "r0"
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);
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}
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74
firmware/decompressor/link.lds
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74
firmware/decompressor/link.lds
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OUTPUT_FORMAT(elf32-sh)
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#define DRAMORIG 0x09000000
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#define DRAMSIZE (MEMORYSIZE * 0x00100000)
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#define IRAMORIG 0x0f000000
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#define IRAMSIZE 0x00001000
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MEMORY
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{
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IRAM : ORIGIN = IRAMORIG, LENGTH = IRAMSIZE
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DRAM : ORIGIN = DRAMORIG, LENGTH = DRAMSIZE
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}
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SECTIONS
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{
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.vectors :
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{
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_loadaddress = .;
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_dramend = . + DRAMSIZE;
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*(.vectors)
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. = ALIGN(0x200);
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} > DRAM
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.text :
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{
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*(.start)
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*(.text)
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. = ALIGN(0x4);
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} > DRAM
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.rodata :
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{
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*(.rodata*)
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*(.rodata.str1.1)
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*(.rodata.str1.4)
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. = ALIGN(0x4);
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} > DRAM
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.data :
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{
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*(.data)
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. = ALIGN(0x4);
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_imgstart = .;
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*(.image)
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. = ALIGN(0x4);
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_imgend = .;
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_iramcopy = .;
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} > DRAM
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.iram IRAMORIG : AT ( _iramcopy )
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{
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_iramstart = .;
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*(.icode)
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*(.idata)
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. = ALIGN(0x4);
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_iramend = .;
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} > IRAM
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.stack :
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{
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_stackbegin = .;
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*(.stack)
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. += 0x0800;
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_stackend = .;
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} > IRAM
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.bss :
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{
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_edata = .;
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*(.bss)
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. = ALIGN(0x4);
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_end = .;
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} > DRAM
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}
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